Good question.
I'll start with Nina.
Nina used to do what I term as cross training. She would lift weights and run, always watched what she ate. She did before I even met her 20 years ago.
SAhe didnt specialize in anything, was a recreational lifter who liked to jog, she ran a half marathon and won some sneakers.
She weighed 63kg. She took pics to enter the Body For Life Challenge and she was devastated.
Being a woman, she had never really listened to me before. She asked for my help. I told her I thought that signing up to lift in a comp would be the best motivator. We chose the CAPO National Titles in 2007. I told her I would only help her if she did EVERYTHING I told her. She agreed.
First thing we did was stop running. Next was focus on increasing the weights she was using. A few months later she competed at 58kg, set State Records and won her weight class.
She lost 5kg AFTER she stopped muscle wasting jogging. She did no cardio during this time at all. Makes you wonder why people think walking and jogging makes them lean.
Annie dropped from 95kg to 71kg, time frame March 2009 till May 2010, and set a National Bench Press record.
Dimi is not nearly as disciplined as either of the 2 girls mentioned, misses sessions and doesnt prepare meals, but she has lost around 10kg, 92kg to 82kg in around 6 months.
Her Doctor told her she needed lap band surgery, its why she started training with me.
Now for a girl to increase her weight, she would need to eat a surplus of calories. I dont have any girls looking for increased weight, just leaner bodies.
Nina and Annie actually tested at 15 and 17% bodyfat from memory, thats very low for a female.
Clean eating, heavy weights, simple, not easy.
Good luck Sara. Christian tells me you drink like a fish, every night, and that he finds Krispy Kreme boxes in your car. You'll have to stop that.